Android--Intent常用（拨号，浏览器，联系人，Wi-Fi）

package com.mrzhu.intenttest;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;

public class IntentTestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
    
    //拨号代码，需要在AndroidManifest.xml文件中加入 拨打电话权限
    //<uses-permission android:name="android.permission.CALL_PHONE"/>
    public void callIntent(View v){
    	Intent callIntent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:12345678"));
    	startActivity(callIntent);
    }
    
    //将电话号码传入拨号程序的代码
    public void dialIntent(View v){
    	Intent dialIntent = new Intent(Intent.ACTION_DIAL, Uri.parse("tel:12345678"));
    	startActivity(dialIntent);
    }
    
    //调用拨号程序的代码
    public void touchDialerIntent(View v){
    	Intent touchDialerIntent = new Intent("com.android.phone.action.TOUCH_DIALER");
    	startActivity(touchDialerIntent);
    }
    
    //调用系统浏览器浏览网页的代码
    public void webIntent(View v){
    	Intent webIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://nkiaguy.blogjava.net"));
    	startActivity(webIntent);
    }
    
    //调用系统程序查看联系人的代码
    public void contaclistIntent(View v){
    	Intent contacListIntent = new Intent("com.android.contacts.action.LIST_CONTACTS");
    	startActivity(contacListIntent);
    }
    
    //显示系统设置界面的代码
    public void settingsIntent(View v){
    	Intent settingsIntent = new Intent("android.settings.SETTINGS");
    	startActivity(settingsIntent);
    }
    
    //显示Wi-Fi设置界面的代码
    public void wifiSettingsIntent(View v){
    	Intent wifiSettingsIntent = new Intent("android.settings.WIFI_SETTINGS");
    	startActivity(wifiSettingsIntent);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="callIntent"
        android:text="@string/btn_callIntent" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="dialIntent"
        android:text="@string/btn_dialIntent" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="touchDialerIntent"
        android:text="@string/btn_touchDialerIntent" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="webIntent"
        android:text="@string/btn_webIntent" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="contaclistIntent"
        android:text="@string/btn_contacListIntent" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="settingsIntent"
        android:text="@string/btn_settingsIntent" />

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="wifiSettingsIntent"
        android:text="@string/btn_wifiSettingsIntent" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="hello">Hello World, IntentTestActivity!</string>
    <string name="app_name">IntentTest</string>
    <string name="btn_callIntent">callIntent</string>
    <string name="btn_dialIntent">diaIntent</string>
    <string name="btn_touchDialerIntent">touchDialerIntent</string>
    <string name="btn_webIntent">webIntent</string>
    <string name="btn_contacListIntent">contacListIntent</string>
    <string name="btn_settingsIntent">settingsIntent</string>
    <string name="btn_wifiSettingsIntent">wifiSettingsIntent</string>

</resources>